Loom for weaving



Feb. 2, 1926. 1,571,878

0. SHIMWELL LOOM FOR WEAVING FiledFeb. 7, 1925 5 Sheets-Sheet l Mama? 0.Zalzzuaa 6Z Feb. 2 1926.

0. SHIMWELL LOOM FOR WEAVING 5 Sheets-Sheet 2 mazzibf 0 kSiZwzlmzueZZ/Filed Feb. 27, 1925 Feb. 2 1926.

o. SHIMWELL LOOM FOR WEAVI'NG Filed Feb. 27, 1925 I 5 Sheets-Sheet 4 vBye/mi 0. @We

Patented Feb. 2, 1926.

UNITED STATES PATENT OFFICE. v

OLIVER SHIMIWELL, OF GAWSWORTH, ENGLAND.

moon ron wnavine.

Application filed February 27, 1925. Serial m. 12,130.

To all whom it may concern:

Be it known that I, OLIVER SHIMWELL, a subject of the King ofGre'atBritain and Ireland, and residing at Gawsworth Old Hall, Gawsworth, inthecounty of Chester, England, have invented certain new and usefulImprovements in Looms for Weaving,

of which the following is a specification.

This invention relates to what are known as shuttleless looms forweaving, in which the weft instead of being carried in cop form in theusual shuttles is provided at the oppowarps is cut into doubled lengths,the end of each length being carried to the opposite side of the loomand being separated by one half of a length supplied from the otherside. The cloth roduced has therefore its selvedges bound y the loops ofthe weft threads, each separated by a cut thread from a loop at theopposite side..

My present invention has for its object to provide improved andsimplified means for producing a cloth similar to that before referredto.

My invention comprises the combination with each of the cheeses orbobbins, which are disposed one at each side of the 100111, of twocombined yarn gripping and severing devices, -a movable yarn guideadapted to pass the yarn from gripper to gripper, a pin or likedeflector adapted to be brought against the length of thread between thetwo grippers and to draw the same out into loop form by withdrawingfurther yarn from the cheese or bobbin, a carrier-like member with ahook thereon adapted to engage one length of the looped yarn and passthe same through the sheet of warp threads, and means whereby the saidcarrier afterits return stroke (during which it puts into the warp anend of a loop thread from the opposite side of the loom) engages andputs into the warp the otherlength of the loop, the end of which hasbeen released by its e pr My invention further comprises the employmentof an endless chain with pins or yarn guides thereon for deflecting theyarn between the two combined yarn grippers and angles to one anothershowin severing devices, the said pins or 'am.

guides projecting inwards from tlie chaln so as to come between thechain lengths and be coaxial with the sprocket wheel over which theehain asses as the in or guide completes the ormation of tile loop ofam, so that each of said guides pauses w ile the part of the chain towhich it is secured passes round the sprocket wheel.

My invention" further comprises the provision of means for drawing outor increasing the quantity of yarn in each length of t e dethe loop fora constant traverse of flector carried by the chain.-

My invention further comprises 'the improved details of construction andarrangement of parts hereinafter described and claimed. I I

. Referring to the accompanyingsheets of explanatory drawings Figure lis a sectional side elevation of a loom constructed and arrangedin oneconvenient form in accordance with my inventron; i

Figure 2 is a plan view of the loom shown in Figure 1 Fig. 3 is an endview of the two gripping and severing devices,

Fig. 4 is a plan view of the same, F'g. 5 is a sectional side elevationon the line AB of Fig. 3,

Fig. 6 is a plan view of the actuating box beneath the yarn gripping'andsevering devices,

Fig. 7 is a plan view operating wheels, and

Figs. 8 and 9 are elevations taken at right an arrangement of adepressing and a de ecting finger. Fig. 10 is a top plan view of aportion of yarn of the'chain and its the material produced by the loom.

The same reference letters in the different views indicate the same orsimilar parts.

' In the illustrated application of my invention, the weft is carried incheese form at a, b, at the opposite sides of the loom, the

cheeses being placed in any convenient posi adapted to feed the yarnfrom gripperto" gripper with a length stretched between ippers.

T e yarn gripping-land severing devices each comprise two be -cranklevers i, one arm of each clipping lever i being ada ted to grip theweft between itself and a fixed member is, while the otherrarm isrmanently acted upon by a spring at who tends to hold the gripper in itsservice position. The severing lever j is similar to the gripper leverand is acted on by a spring a. At

one side the gri ping and severing devices are' operate u on by twoseparate arms 0, 39 upon spin les g, r whlch carry tappets s, t engagingcams or eccentrics u, '0.

At the other side the severing lever or knife j is operated upon by anarm to upon a spindle a: carrying a tappet y engaging a cam e. Theripper lever c" at t e righthand side of igure 3 has a pin 2 mountedthereon which rests upon the severing lever or knife j so thatthe'movement of the said lever z" is determined by the movement of theknife but the gripper grips the weft thread always slightly before theknife severs the same as hereinafter described. Guides 3 and 4: arearranged at the opposite sides of each gripper and severing device tokeep the weft threads in correct osition for gripping and severing. The

lcrum pin 7 of t e 1iguide carrying lever e carries the tappet 5, igures5 and 6, which engages the cam or concentric 6. The cams o, z, u, 6 aresecured upon the spindle 7 rotated by gearin 8 from the shaft 9. Thecams a, o, e an 6 are enclosed within a box 40 upon which the'threadgripping or holding and severing devices before described are mounted.

An endless chain 10 (at each side of the machine) with preferably twoequally spaced brackets 11, 12 thereon carrying guide rollers 13, 14projecting therefrom, is passed over two sprocket wheels 15, 16, the

wheels 16 being positively rotated by suitable means. Figure 7 is anenlarged view of part of a chain 10 with its driving sprocket wheel 16and yarn guide roller 14. The guides 13, 1a are adapted to engage thelength of yarn stretched between t e two grippers g, it (Figure 2)aforesaid and to deflect or draw out. the same into loop form bywithdrawing yarn from the cheese.

-When the loo is fully produced, the guide is 011 a part 0 the chainpassing around the sprocket wheel and as the guide is then coaxial withthe sprocket wheel 15, there is a dwell or pause during which the loopis held by the guide roller, while means transfor one length thereof tothe shuttle-like member or weft carrier 17. The end of said transferredlength is cut by one of the combined ripper and severing devices.

If the length of yarn in the loop is not suflicient for the width ofcloth being woven,

I provide auxiliary deflectors acting upon the two lengths of yarnconstituting the loop. Such deflectors cause an increased len h of yarnto be drawn from the cheese. Re erring to Figures land 2, the auxiliarydeflectors are shown at 18, 19. The are each carried by a vertical rod20 having a pin 21 thereon engaged by a forked arm 22 acted upon by acam 23 carried by a spindle rotated in unison with the chain 10 asshown. A spring 24 tends to raise the arm 22 and the deflector.Adjustment of the stroke of the deflector is affected by means of thescrew 25 which tilts the lever 26 carrying the pivotal point of the arm22. A spring 27 tends tohold the lower end of the lever 26 down. InFigure 1 the displacer 18 is shown in dotted lines in a position inwhich it has drawn out an extra length of am into the loop formed by thechain ui e 13.

In rangement of the depressor and the deflecting finger for ensuringthat'the weft threads enter the weft carrier when the latter ispropelled through the shed in the manner usual with ordinary shuttles.The arrow A, Figure 1, points to the part of the loom which is shown'inmore detail in Figures 8 and 9. The depressor 27 upon the rod 28 isshown in its lowermost osition in full lines in the said figures. edotted lines in Figure 9 show the depressor raised. Means (not shown)are provided, whichturn an arm 29 causing the oscillation or turning ofa finger 30 in sucha way that it is moved to its upright position fromthe inclined position shown in dotted lines in Figure 8 and carries theweft thread which was at the left-hand side of the loop formed by theguide wheel 13 to what was the right-hand side of the said loop, whereit comes beneath the depressor 27 and is so held in place to be engagedby the weft carrier and carried through the shed. The deflector does notoperate on both lengths of the looped thread but only on the lengthwhich is the more removed from the sheet of warp thread represented by31. The depressor 27 operates on both lengths of the loop to ensuretheir engagement by the weft carrier. Referrin to Figure 8, if a loop ofthread be dispose around the guide 13, the first lowering of thedepressor 27 will bring the right hand side of the loop' into the pathof the weft carrier 17 by which it is taken into the shed. WVhen thecarrier has returned, the deflector or finger 30 will transfer the lefthand length of the loop to the right so that it will be engaged andlowered b the depressor 27 on its next descent, a er which the weftcarrier transfers it intothe shed.

The carrier-like member is double-ended so as to act on weft threadsfrom each side of the loom. After taking one length igs. 8 and 9 thereis shown an ar- '82 on a lever 33 is moved into the loop at the correctmoment in order to retain the yarn at the end of the loopafter the gulde13 or 14 has passed round the end sproclret wheel 15 and so maintain theyarn tension between itself and the cloth selvedge until the secondlength of yarn is transferred to the shuttle or weft carrier. At therighthand side of Figure 2 the pin 32 is shown in the loop and at theleft-hand side it is shown about to enter the loop.

It will be understood that similar mechanisms are provided at each sideof the loom. The operation of the mechanism 1s as follows :Assuming inFigure 2 and the left-hand side thereof, that the loop of thread hasbeen transferred into the .warps by the weft carrier, then the grip mgdevice at 9 will be holding the on of the thread. The guide carryinglever e now moves to pass the thread across from to h, the gripper andsevering levers on t e latter being open. The guide wheel 14 on thechain comes into engagement with the thread stretched betwen the gripperof g and the guide eye (I and draws the thread out nto a loop, anyadditional thread required in the loop 'being obtained by the auxiliarydeflectors 18 and 19 being depressed upon the two lengths of threadconstituting the loop; When the guide wheel 14 comes coaxial wit thesprocket wheel 15, thegripper of the device h closes and the severinglever or knife 2" of such device cuts the thread end between the gripperand the guide wheel 14. The depressor 27 presses the weft into the lineof the carrier. The latter now carries the length of weft nearest thewarp threads through the shed and the pin 32 enters the end of the loop.The weft carrier then returns through the shed with another length ofthread from the opposite side of the loom. In preparation for thetransfer of the second length of the loop into the shed, the deflector30 carries the said length beneath the depressor 27 and the gripper ofthe device 9 opens so releasing the end of said length. While thecarrier is carryin the remainder of the loop at the left-han side of theloom through the shed the depressor 27 is raised, the deflector 30 movedto the dotted line position, Figure 8, the pin 32 lowered, the auxiliarydeflectors 18, 1.9 are raised and the cycle of operations can now berepeated. This time the thread is stretched from the gripper of k to apoint adjacent the device 9 by the guide all and the loop produced asalready described. When the loop is produced, 9 grips its end and then hreleasesits end before the Weft carrier acts thereon. Later the gripper9 outs its end, still, however, holding the part of the thread adjacentthe guide (1 so that the next'loop can be formed in the mannerpreviously described.

The chain 10 may be operated through a drive containing an eccentric soas to obtain a slowing down of the speed of the chain when a guide 13 or14 is passing round the sprocket wheel 15.

I do not limit myself to any particular means for operating the grippingand thread severing devices and the deflectors. It will be understoodthat the application of my invention to a loom does not involve anymaterial alteration to the latter.

I claim:

1. In a loom for weaving, weft supplying means comprising in combinationtwo weft gripping and severing devices disposed in pairs'at each side ofthe loom, means for transferring the weft from one of the devices ofeach pair to the other of the same pair, other means for drawing out theweft thread stretched between the said devices into loop form, and aweft carrier adapted to be traversed from side to side of the loom andto carry'the halves of the loops successively from opposite sides of theloom through successive warp sheds.

2. In a loom as claimed in claim 1, wherein there is provided an endlesschain, and guides carried by the chain and adapted to pass in the pathof the thread stretched between the weft gripping and severing devicesfor the purpose of producing the loop threads, substantially asdescribed.

3. In a loom, weft supplying means comprising in combination two spacedstationary devices each including a thread holding element and a threadsevering element, means for operatin said elements and a pivotallymounted lever provided with a guide-eye, means for oscillating saidlever to carry the weft thread from one device to the other, an endlesschain, a plurality of guides carried by and projecting downwardly fromthe chain and passing through the space between the said device so as todraw out the thread into a loop, and a weft carrier adapted to pass onelength of the loop into the warp shed and then after its return to passthe other end of the loop into the successive Warp shed, substantiallyas described.

4. A loom as claimed in claim 3, wherein auxiliary deflectors areprovided for drawing additional lengths of thread into the loops,substantially as and for the purposes set forth.

' 5. A loom as claimed in claim 3, wherein means is provided fordeflecting and dein the end of the loop until the second length setforth.

7. In a'loom, stationary weft supplying means comprising in combinationtwo spaced stationary devices each of which comprises a thread holdingelement and a thread severing element, means for operating saidelements, Weft presenting devices, a pivotally mounted lever providedwith a guide'eye, means for oscillating the guide-eye carrying lever tocarry the weft thread from one device to the other, an endless chain, aplurality of guides carried by and projecting from the chain and passingthrough the space be- 15 taking the two lengths of the loop througi thewarp sheds, substantially as and for the purposes set forth.

In testimony whereof I have signed my name to this specification.

OLIVER SHIMVVELL.

